VScode

https://webnautes.tistory.com/1158

Templates

https://www.section.io/engineering-education/understanding-c++-templates/

https://velog.io/@springkim/C-template-argument

https://www.programiz.com/cpp-programming/class-templates

• function template
  https://www.codezclub.com/cpp-sum-of-array-using-function-template/